基于重复控制的混合拓扑SVG控制策略研究

Study on Hybrid Topology SVG Control Strategy Based on Repetitive Control

阐述基于三电平和级联H桥功率单元的混合型多电平拓扑SVG系统的控制方案,与传统级联H桥拓扑SVG相比,该拓扑在功率密度,成本方面有明显竞争力。探讨基于重复控制和PI调节器结合的谐波电流补偿控制策略,以及直流母线电压的均压控制方法。通过仿真验证了所提出控制策略的可行性。

This paper proposes a control scheme for a hybrid multi-level topology SVG system based on three-level units and cascaded H-bridge power units. Compared with the traditional cascaded H-bridge topology SVG, this topology has obvious competitiveness in power density and cost. A harmonic current compensation control strategy based on the combination of repetitive control and PI regulator, and a DC bus voltage balancing control method are also proposed for this topology. The feasibility of the proposed control strategy is verified by simulation.